A circularly polarized implantable monopole antenna for biomedical applications

Abstract

In this paper, a compact, circularly polarized printed monopole antenna is proposed at ISM band (2.4–2.48 GHz) for biotelemetry and implantable applications. The proposed antenna possesses a small dimension (10 × 10 × 0.3 mm3) and simple microstrip feeding structure. The circular polarization is easily achieved by introducing an “L” shape stub at the ground plane in ISM. The simulated 10 dB impedance bandwidth is around 13.87%, and 3 dB AR bandwidth is around 5.3%. The effect of different body phantoms is discussed to evaluate the sensitivity of the proposed antenna. The simulated peak gain of the proposed antenna is about −7.79 dBi across the operating band. The SAR analysis of the antenna configuration has also been studied.